LCD-S866 Unofficial User Manual

Dimensions and Materials

The outer casing of the product is made of ABS, and the transparent LCD window is made of acrylic with high hardness, with a hardness value equivalent to that of tempered glass.

Dimensions:

• Width: 80.50mm
• Height: 47.50mm
• Depth: 34.00mm
• Mounting diameter: 22.2mm

Operating Voltage and Connections

Operating Voltage: DC24V, 36V, 48V, 60V. Other voltages can be adapted.

Connections:

Features

The LCD displays:

• Riding time, current speed, riding distance, power, average speed, total distance traveled, current, highest speed, battery voltage, battery monitor, PAS level, error codes, and status indicators.
• Available settings include: backlight brightness, metric and imperial units, voltage level, idle time, number of assist levels, wheel diameter, number of motor magnets, speed limit, zero start, riding mode, boost sensitivity, boost start strength, number of PAS magnets, controller current limit, controller undervoltage, ODO reset, walk assist, cruise control, speed ratio, 0-gear, and communication protocol.

Communication Protocol: UART. All display functions are shown for 1 second upon powering on the display (display test).

Display Content

1.1 Battery Indicator

When the battery is full, all 6 segments of the battery indicator are visible (black).

1.1 Multifunction Display Area

ODO: Total distance traveled. DST: Riding distance. VOL: Battery voltage. TM: Riding time. CUR: Operating current. WATT: Instantaneous power. Error Code (see error code table). Depending on the setting of parameter P02, the speed is displayed in km or miles.

1.2 Speed Display Area

AVG: Average speed. MAX: Maximum speed. CUR: Current speed (mph or km/h). The speed signal is received from the hall sensors and/or the speed sensor in the hub motor and sent to the display via the controller. The display calculates the speed based on the wheel diameter and hall signal/speed sensor data. If a hub motor does not have a built-in speed sensor (no white hall sensor cable), the display will only show speed when the motor is engaged. In this case, an external hall speed sensor can be installed, which will also show the speed constantly during coasting. Depending on the setting of parameter P02, the speed is displayed in km/h or mph.

1.3 Assist / Speed Limit Area

Depending on the setting of parameter P05, 3 to 9 levels are available.

1.4 Status Indicator Area

• Communication failure (!)
• Walk assist ?
• Cruise control ⚙️
• Electric brake active ⚡
• Light ?

1.5 Buttons, Display Modes, and Functions

1.1 Turning the Display On/Off, Available Modes

To turn the display on or off, press and hold the power button. After the display is turned on, you will see display mode 1. Briefly press the power button to cycle through the available display modes.

Display Modes:

• Mode 1: Riding time, current speed, riding distance.
• Mode 2: Power, average speed, total distance traveled.
• Mode 3: Current speed, maximum speed reached, battery voltage.

Battery monitoring and PAS level are visible in all modes.

1.7 PAS and Maximum Speed Level

Briefly press the Plus button (+) to increase the assist/speed limit. Briefly press the Minus button (-) to decrease the assist/speed limit. If you select PAS level 0, you can temporarily disable PAS/throttle. Note: PAS level 0 is only available if parameter P19 is set to "0".

1.8 Light

Press and hold the Plus button (+) to turn on the light. The light symbol will be displayed, and the lights will turn on. Press and hold the Plus button (+) again to turn off the light.

1.9 Walk Assist

Walk assist propels the bicycle at a constant speed of 6 km/h, allowing you to walk alongside the bicycle without pushing it. Press and hold the Minus button (-) to activate walk assist. When walk assist is activated, the walk assist symbol will be displayed. Press and hold the Minus button (-) again to deactivate. Note: This function only works if parameter P17 is set to "0".

1.10 Automatic Cruise Control

Cruise control activates automatically when a constant throttle speed is maintained for six seconds. When cruise control is active, the cruise control symbol will be displayed, and the throttle no longer needs to be held in position for the bicycle to maintain its current speed. Note: This function only works if parameter P17 is set to "1".

1.11 Zero Start

Zero start allows the motor to accelerate from a complete standstill using the throttle. Note: Parameter P09 must be set to "0" to enable zero start.

When zero start is disabled, the bicycle must reach a minimum speed of ?? km/h before the throttle can activate the motor. Note: Parameter P09 must be set to "1" to disable zero start.

2. Settings

2.1 Changing Parameters

Press and hold the Plus and Minus buttons (+) (-) simultaneously to enter parameter mode. Briefly press the On/Off button to cycle through the parameters (P01-P20). (See parameter list for details).

Briefly press the Plus button to increase the parameter value, and briefly press the Minus button to decrease the value. After changing a parameter value, briefly press the On/Off button to save the parameter value and move to the next parameter. After changing the parameters, press and hold the Plus and Minus buttons simultaneously to manually save the parameters and exit parameter setting mode. Alternatively, wait 8 seconds for the parameters to be automatically saved and exit parameter setting mode.

2.2 Setting a Password

Press and hold the Plus and Minus buttons (+) (-) simultaneously to enter parameter mode. Now, press and hold the Power and Plus buttons simultaneously to enter password setting mode.

Use the Plus and Minus buttons to change a digit. Briefly press the Power button to go to the next password digit. After the password has been changed, press and hold the Power and Plus buttons simultaneously to save the password and exit password setting mode.

(Note: From now on, you will need to enter the password when turning on the display).

Press and hold the Plus and Minus buttons simultaneously again to manually save parameters, exit parameter setting mode, and return to the normal user interface.

Alternatively, wait 8 seconds to automatically save parameters and exit parameter setting mode.

Password Forgotten

If you have forgotten your password, use the master password: "3745" and press and hold the Power and Plus buttons for 10 seconds to access the normal user interface. You can now set a new password by following the steps described above.

2.3 Parameter List

• P01: Backlight brightness level: 1-3 (3 = max. brightness)
• P02: Metric / imperial units: 0 = km, 1 = mile
• P03: Voltage level: 24V, 36V, 48V, 60V, 64V (Default = 36V)
• P04: Shutdown time in minutes: 0-60 (0 = always on). Note: This function might not work.
• P05: Number of assist levels: 0 = 3 assist levels, 1 = 5 assist levels, 2 = 9 assist levels
• P06: Wheel diameter in inches; Accuracy: 0.1; This parameter is needed to display the speed accurately.
• P07: Number of speed signal magnets in the motor × Motor gear ratio: 1-100; This parameter is needed to align the actual bicycle speed with the maximum speed setting. For a normal hub motor, enter the number of speed signal magnets in the motor; for a geared hub motor, multiply the number of speed signal magnets by the gear ratio; Number of magnets × Gear ratio = Input value; Example: Number of motor magnets = 20, (Gear) ratio = 4.3 Input value = 20×4.3 = 86
• P08: Speed limit: 0-100 km/h, 100 means unlimited speed. The value indicates the maximum speed of the bicycle. Example: A value of 25 means the bicycle's maximum speed will not exceed 25 km/h; the rotation speed is maintained at the set value. Error: ±1 km/h; (both assist and throttle limit). Note: This value is based on metric units (km/h), but can also be a percentage even if the display is set to imperial units (mph).
• Note: Parameters P09-P15 are only valid if the display has an active data connection with the controller.
• P09: Zero start: 0 = enabled, 1 = disabled
• P10: Riding mode: 0 = PAS (1:1) active (throttle disabled), 1 = Throttle active (PAS disabled), 2 = PAS and throttle both active
• P11: PAS sensitivity: 1-24
• P12: PAS start strength: 0-5. Note: This function may not work.
• P13: Number of magnets on the PAS disc of the crankset: 5, 8, 12
• P14: Controller current limit: 1-20A (default = 12A)
• P15: Low voltage cutoff; Accuracy: 0.1 depending on P03 setting
• P16: ODO Reset. Press and hold the Plus button for 5 seconds to reset.
• P17: 0 = Walk assist active, 1 = Cruise control active
• P18: Displayed speed adjustment: 50%-150%
• P19: PAS Level 0: 0 = PAS Level 0 active, 1 = PAS Level 0 disabled
• P20: Communication protocol: 1 = Protocol 2, 2 = Protocol 5S, 3 = Alternative Protocol. Do not change, leave at default, or your S866 display may not communicate with the controller!

3. Error Codes

If there is an error in the electrical function of the bicycle, an error code will be displayed. Error codes are automatically cleared when the problem is resolved and the bicycle reaches a minimum motor-assisted speed of 6 km/h. The following table provides descriptions of the error codes.